CBCNature.java

package cbclipse.builder;

import java.io.ByteArrayInputStream;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

import org.eclipse.core.resources.ICommand;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.resources.IProjectNature;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Path;

import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;

import org.eclipse.jdt.launching.LibraryLocation;

import cbclipse.Activator;
import cbclipse.preferences.PreferenceConstants;

public class CBCNature implements IProjectNature {

	/**
	 * ID of this project nature
	 */
	public static final String NATURE_ID = "cbclipse.builder.cbcNature";

	private IProject project;

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.resources.IProjectNature#configure()
	 */
	public void configure() throws CoreException {
		IProjectDescription desc = project.getDescription();
		ICommand[] commands = desc.getBuildSpec();

		for (int i = 0; i < commands.length; ++i) {
			if (commands[i].getBuilderName().equals(CBCBuilder.BUILDER_ID)) {
				return;
			}
		}

		ICommand[] newCommands = new ICommand[commands.length + 1];
		System.arraycopy(commands, 0, newCommands, 0, commands.length);
		ICommand command = desc.newCommand();
		command.setBuilderName(CBCBuilder.BUILDER_ID);
		newCommands[newCommands.length - 1] = command;
		desc.setBuildSpec(newCommands);
		project.setDescription(desc, null);
		
		IJavaProject javaProject = JavaCore.create(project);
		Set<IClasspathEntry> entries = new HashSet<IClasspathEntry>();
		entries.addAll(Arrays.asList(javaProject.getRawClasspath()));
		String osPath = Activator.getDefault().getPreferenceStore().getString(PreferenceConstants.P_PATH);
		IPath path = Path.fromOSString(osPath);
		LibraryLocation location = new LibraryLocation(path, Path.EMPTY, Path.EMPTY);
		entries.add(JavaCore.newLibraryEntry(location.getSystemLibraryPath(), null, null));
		javaProject.setRawClasspath(entries.toArray(new IClasspathEntry[entries.size()]), new NullProgressMonitor());
		
		IFile commCBC = project.getFile("comm.cbc");
		commCBC.create(new ByteArrayInputStream(new byte[] {}), true, new NullProgressMonitor());
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.resources.IProjectNature#deconfigure()
	 */
	public void deconfigure() throws CoreException {
		IProjectDescription description = getProject().getDescription();
		ICommand[] commands = description.getBuildSpec();
		for (int i = 0; i < commands.length; ++i) {
			if (commands[i].getBuilderName().equals(CBCBuilder.BUILDER_ID)) {
				ICommand[] newCommands = new ICommand[commands.length - 1];
				System.arraycopy(commands, 0, newCommands, 0, i);
				System.arraycopy(commands, i + 1, newCommands, i,
						commands.length - i - 1);
				description.setBuildSpec(newCommands);
				project.setDescription(description, null);			
				return;
			}
		}
		
		// TODO: Remove CBCJVM.jar
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.resources.IProjectNature#getProject()
	 */
	public IProject getProject() {
		return project;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.resources.IProjectNature#setProject(org.eclipse.core.resources.IProject)
	 */
	public void setProject(IProject project) {
		this.project = project;
	}

}